α′-(Fe_<100-x>Ni_x)-N(x=5-30)薄膜の構造と飽和磁化

概要

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Fe-Ni-N films were fabricated on MgO{100} single-crystal sunstrates by dc facing-targets sputtering. Structural analysis and magnetic measurement were carried out. The results can be summarized as follows: (1) for the as-deposited (Fe_<100-x>Ni_x)-N films, α′ phase with a stoichiometric N content of 11 at% can be formed up to x=10; (2) the phase decomposition temperature T_<p.d.> of α′-(Fe_<100-x>Ni_x)_<16>N_2(x=0-10)depends strongly on the Ni content of the film. The T_<p.d.> of α′-(Fe_<100-x>Ni_x)_<16>N_2 decreases from about 200℃(x=0)to about 50℃(x=10)with increasing Ni content; (3) the formation at R.T.of stable α″-(Fe_<100-x>Ni_x)_<16>N_2(x=5-30)in the Fe-Ni alloy system is concluded to be difficult; and (4) judging from the dependence of the saturation magnetization for α′-(Fe_<100-x>Ni_x)_<16>N_2 on the Ni content, the saturation magnetization of α′-Fe_<16>N_2 is 220 emu/g.
社団法人日本磁気学会の論文
2000-04-15